This series consists of models with porro prism, BaK4 prism. This series also benefits from a new multi-coating of the lenses which guarantees the user a clearer vision thanks to a better transmission of light. The rubber exterior finish provides excellent shock protection for your binoculars. Magnification: 8x. Effective aperture of the objective: 40mm. Angle of view: 6.5 degrees. Field of view (at 1000m): 110m. Exit pupil: 5mm. Ocular clearance: 20mm. Relative brightness: 20,3. Minimum focusing distance: 3,5m. Height (approx.) 136 mm. Width (approx.): 178mm. Thickness (approx.): 76mm. Weight (approx.): 850 gr.